Quantcast

Microplastics Are Raining Down on Cities

Climate
Researchers found a surprisingly high concentration of microplastics in London rain. Ed Schipul / CC BY-SA 2.0

Microplastics have been found everywhere in the world, from the depths of the ocean to the pristine mountaintops of the Pyrenees mountains to Arctic snow. Now a team of researchers in the United Kingdom is testing the concentrations of microplastics in cities. Sure enough, the tiny plastic particles are raining down on urban populations, as The Guardian reported.


So far, the scientists have tested four cities and found microplastics — pieces of plastic roughly the size of a sesame seed or smaller — in all of their samples. The researchers expect that the pattern will continue and every city they test will show microplastics contaminating the air, according to The Guardian. Scientists do not yet know what health effects, if any, are associated with breathing in microplastics, though they do know that air pollution can damage nearly every organ and affect every cell in the human body, according to a comprehensive global review published earlier this year.

The scientists were surprised about just how much plastic was found in the air.

"We found a high abundance of microplastics, much higher than what has previously been reported," said Stephanie Wright, from Kings College London, who led the research, to The Guardian. "But any city around the world is going to be somewhat similar."

"I find it of concern – that is why I am working on it," she added. "The biggest concern is we don't really know much at all. I want to find out if it is safe or not."

The concentration of microplastics in London was alarming. The researchers collected microplastics falling onto the roof of a nine-story building in central London. They found a range of 575 to 1,008 pieces of plastic per square meter per day, according to the research published in the journal Environment International, as The Guardian reported. By contrast, when researchers found microplastics in the Pyrenees in southern France, they found roughly 11,400 pieces per square meter in a month, which is about one-third of what was collected in London.

"We kind of expected to find plastics there, but we certainly were not prepared for the numbers we found," said Deonie Allen, one of the lead researchers in the Pyrenees study, to The New York Times. "It was astounding: 11,400 pieces of microplastic per square meter per month, on average."

Another of the researchers in that study, Steve Allen, at the EcoLab research institute near Toulouse, France, called the findings scary. He also read Dr. Wright's study about urban microplastic pollution.

"These studies showing just how much plastic is in the air are a wake-up call," said Allen to The Guardian. "The [London research] is a very well done study showing incredibly high numbers of airborne microplastics."

What Dr. Wright and her team found in London comprised 15 different types of plastics. Most were acrylic fibers, likely from clothes. Only 8 percent of the microplastics were particles like polystyrene and polyethylene, which are ubiquitous in food packaging, as The Guardian reported.

Furthermore, the plastics they found were between 0.02mm and 0.5mm. That's large enough to enter the airways or to get trapped and swallowed in saliva. However, smaller particles that are particularly damaging to the lungs and can enter the bloodstream were too small to be measured by current technology, according to The Guardian.

"Currently we have very little knowledge on what effect this airborne pollution will have on humans," said Allen to The Guardian. "But with what we do know it is pretty scary to think we are breathing it in. We need urgent research."

EcoWatch Daily Newsletter

Farm waste being prepared for composting. USDA / Lance Cheung

By Tim Lydon

Can the United States make progress on its food-waste problems? Cities like San Francisco — and a growing list of actions by the federal government — show that it's possible.

Read More
Pexels

By C. Michael White

More than two-thirds of Americans take dietary supplements. The vast majority of consumers — 84 percent — are confident the products are safe and effective.

Read More
Sponsored
Pexels

By Brianna Elliott, RD

Coconut oil has become quite trendy in recent years.

Read More
The common giant tree frog from Madagascar is one of many species impacted by recent climate change. John J. Wiens / EurekAlert!

By Jessica Corbett

The human-caused climate crisis could cause the extinction of 30 percent of the world's plant and animal species by 2070, even accounting for species' abilities to disperse and shift their niches to tolerate hotter temperatures, according to a study published this week in the journal Proceedings of the National Academy of Sciences.

Read More
SolStock / Moment / Getty Images

By Tyler Wells Lynch

For years, Toni Genberg assumed a healthy garden was a healthy habitat. That's how she approached the landscaping around her home in northern Virginia. On trips to the local gardening center, she would privilege aesthetics, buying whatever looked pretty, "which was typically ornamental or invasive plants," she said. Then, in 2014, Genberg attended a talk by Doug Tallamy, a professor of entomology at the University of Delaware. "I learned I was actually starving our wildlife," she said.

Read More